CN211770798U - Hospital sewage treatment process system - Google Patents

Abstract

The utility model discloses a hospital sewage treatment process system, which comprises a hydrolysis and acidification tank, a mud discharge pipeline is arranged at the bottom of the hydrolysis and acidification tank, and the grid well is connected to a comprehensive adjustment tank through a first lift pump. The tank is connected to the hydrolysis and acidification tank through the second lift pump, and the hydrolysis and acidification tank is respectively connected with the sludge concentration tank and the contact oxidation tank. The beneficial effect of the utility model is that the pretreated sewage in the hydrolysis acidification tank enters the contact oxidation tank In China, sewage is treated with biofilm, which is an ecosystem composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae. First, the biofilm adsorbs the organic matter in the water layer, decomposes the organic matter with aerobic bacteria, and then enters the anaerobic layer for anaerobic decomposition. At the same time, the flowing water can wash away the aging biofilm to grow new organisms Membrane, in this way, can achieve the purpose of purifying water quality.

Description

A hospital sewage treatment process system

technical field

The utility model relates to the technical field of sewage treatment, in particular to a hospital sewage treatment system.

Background technique

With the acceleration of economic development in my country in recent years, people's material living conditions and medical conditions continue to improve, people pay more attention to their own health, the frequency and demand for medical treatment increase, and the amount of hospital sewage is also increasing. Hospital sewage mainly consists of two parts, namely, the medical wastewater produced by each department during the operation, and the domestic sewage of the hospital. The main pollutants are organic pollutants, pathogenic microorganisms and viruses. Sewage contains a large number of germs, which have potential risks of disease infection, and are likely to cause a variety of infectious diseases and epidemics, and some pathogenic bacteria have certain resistance to the surrounding environment and can survive in sewage for a long time. Great health and environmental threat. There may also be radioactive substances in some sewage, which will directly endanger human health if not treated.

At present, most hospitals generally use mechanical grids and chemical treatment to treat sewage. Although the process is simple and the investment is low, the cost of using chemicals is high, and the macromolecular organic matter in sewage cannot be effectively removed. At the same time, a large number of The use of chemical agents adversely affects the health of operators, and produces a large amount of sludge containing pathogenic microorganisms and viruses, which is likely to cause secondary pollution to the environment. Some hospitals also use aerated biological filters to treat sewage. Although the operation effect is good, its single treatment method is difficult to remove the refractory biodegradable pollutants in the water, and the later maintenance and replacement of the filter material is expensive, and the operation management The high cost brings great difficulty to the operation and management of the hospital.

Utility model content

The purpose of this utility model is to provide a hospital sewage treatment system and method with less dosage of medicament, less sludge production, low operating cost, resistance to impact load of water quality and quantity, and effective degradation of organic matter, so as to solve the problems raised in the above background technology .

In order to achieve the above purpose, the present utility model provides the following technical solutions: a hospital sewage treatment process system, comprising a grid well, a comprehensive adjustment tank, a hydrolysis acidification tank, a contact oxidation tank, a sedimentation tank, a disinfection tank and a Parshall tank, The description sequence is fixed and connected in sequence, the hydrolysis and acidification tank is also connected with the sludge thickening tank, the sewage outlet of the sludge thickening tank is provided with a screw stacker, the sludge thickening tank is also connected back to the comprehensive adjustment tank, and the sedimentation tank The hydrolysis and acidification tank is connected back to the hydrolysis acidification tank through the sludge return pump. The grid well is a rotary fine grid and is equipped with a corresponding grid slag screw conveyor. The bottom of the hydrolysis acidification tank is provided with a sludge discharge pipeline. The grid well is connected to the comprehensive adjustment tank through the first lift pump, the integrated adjustment tank is connected to the hydrolysis and acidification tank through the second lift pump, and the disinfection tank is provided with a Parshall tank.

Preferably, the hydrolysis and acidification tank is a cylindrical tank body, a cover plate is provided on the top of the hydrolysis and acidification tank, a gantry frame is welded on the top of the cover plate, and a mixer is fixedly installed on the gantry frame, and the hydrolysis and acidification tank is The interior of the acidification tank is provided with a reaction zone partition plate, a water outlet bell mouth is arranged on the reaction zone partition plate, and a supernatant liquid return pipe inlet is arranged in the center of the bell mouth, and the supernatant liquid return pipe inlet passes through the supernatant liquid. The return pipe is communicated with the outlet of the return pipe, an effluent overflow weir is arranged at the opening of the hydrolysis and acidification tank, the bottom of the hydrolysis and acidification tank is a mud bucket structure, and biological fillers are arranged below the effluent overflow weir, so the The biological filler adopts the hollow fiber membrane and the elastic filler to be arranged at intervals.

Preferably, the biological filler is spaced by a hollow fiber membrane and an elastic filler, the outer diameter of a single membrane wire of the fiber membrane is 4.0-4.4 mm, and the surface thereof is porous.

Preferably, the pore diameter of the holes is 0.1-0.2 microns, and the membrane filaments are bundled to form membrane bundles every 50-100 units.

Preferably, the minimum outer diameter of the membrane bundle is 20 mm, the maximum outer diameter is 100 mm, and the specific surface area is 12000 m ² /g.

Preferably, the contact oxidation tank is provided with an aeration unit and a packing unit.

Preferably, the aeration unit adopts a combined aeration method of a jet aerator and a microporous aeration disc, and each of the four corners of the bottom of the pool body is placed with a jet aerator, and then a jet aerator is placed at the bottom of the pool body. The aeration pipes are evenly arranged in the center.

Preferably, the distance between the axes of the pipes is 500mm, and the distance between the axes of the aeration discs is 600mm.

Preferably, a biofilm is installed in the contact oxidation tank, and the biofilm is an ecosystem composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The hydrolysis and acidification tank of the present invention adopts the form of a composite hydrolysis reactor, the upper layer of the reactor is a filler layer, and a special elastic filler of polyamide material is used, which has the advantages of no clogging, long material life and no adhesion of groups. , at the same time its large surface area, fast film hanging, shorten the system debugging time.

2. The hydrolysis and acidification tank of the present invention is provided with a mixer. During stirring, some sludge at the bottom is in a suspended state, which is fully mixed with the incoming wastewater to improve the water quality treatment effect. The suspended sludge can play a strong flocculation effect, making the impurities in the water settle quickly, and decompose the complex macromolecular organic matter into simple small molecular organic matter through the hydrolysis bacteria in the pool; at the same time, the COD and SS of the sewage are relatively high. The high removal rate reduces the difficulty of subsequent aerobic biochemical treatment and reduces the output of sludge.

3. The hydrolysis and acidification tank of the present invention adopts mechanical stirring, baffle mixing and installed hollow fiber membrane packing arrangement as the material of the microbial carrier; this packing combination has a large number of microorganisms attached and a wide range of microbial activities, so that the The amount of pollutants digested per unit volume is large, the impact load resistance is strong, and the water quality fluctuation has little impact on the treatment effect, correspondingly reducing the residence time of sewage and improving the treatment effect.

4. The biofilm system designed by the utility model is an ecosystem composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae, etc. The aerobic bacteria decompose the organic matter, and then enter the anaerobic layer for anaerobic decomposition. The flowing water can wash away the aging biofilm to grow a new biofilm. This cycle strengthens and purifies the water quality.

5. There are cultured suspended sludge and hydrolyzed bacteria in the hydrolysis and acidification tank of the utility model. The suspended sludge can effectively intercept and flocculate the suspended solids in the sewage, and improve the water purification effect. At the same time, the hydrolyzed bacteria can make complex The macromolecular organic compounds are decomposed into simple small molecular organic acids.

Description of drawings

Fig. 1 is the system flow chart of the utility model;

Figure 2 is a schematic structural diagram of the hydrolysis and acidification tank of the present invention.

In the picture: 1 gantry, 2 cover plate, 3 effluent overflow weir, 4 biological filler, 5 effluent bell mouth, 6 reaction zone partition, 7 mud bucket, 8 mixer, 9 supernatant night return pipe, 10 return pipe outlet, 11 Supernatant return line inlet.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1-2, the utility model provides a technical solution: a hospital sewage treatment process system, including a grid well, a comprehensive adjustment tank, a hydrolysis acidification tank, a contact oxidation tank, a sedimentation tank, a disinfection tank and a parshall The hydrolysis and acidification tank is also connected with the sludge thickening tank, the sewage outlet of the sludge thickening tank is provided with a screw stacker, and the sludge thickening tank is also connected to the comprehensive adjustment tank in a return flow. The sedimentation tank is connected to the hydrolysis and acidification tank through a sludge return pump. The grid well is a rotary fine grid and is equipped with a corresponding grid slag screw conveyor. The bottom of the hydrolysis and acidification tank is provided with a sludge discharge pipeline. The grid well is connected to the comprehensive adjustment tank through the first lift pump, the integrated adjustment tank is connected to the hydrolysis and acidification tank through the second lift pump, and the disinfection tank is provided with a Parshall tank.

It is worth noting that the hydrolysis and acidification tank is a cylindrical tank body, the top of the hydrolysis and acidification tank is provided with a cover plate 2, the top of the cover plate 2 is welded with a gantry frame 1, and the gantry frame 1 is fixedly installed There is a mixer 8, the interior of the hydrolysis and acidification tank is provided with a reaction zone partition plate 6, the reaction zone partition plate 6 is provided with a water outlet bell mouth 5, and the center of the bell mouth 5 is provided with a supernatant liquid return pipe inlet 11, The supernatant liquid return pipe inlet 11 is communicated with the return pipe outlet 10 through the supernatant liquid return pipe 9, an outlet overflow weir 3 is provided at the opening of the hydrolysis acidification tank, and the bottom of the hydrolysis acidification tank is a mud hopper. 7 structure, biological fillers 4 are arranged below the effluent overflow weir 3, and the biological fillers 4 are arranged with hollow fiber membranes and elastic fillers at intervals.

It is worth noting that the hydrolysis and acidification tank specifically adopts the composite arrangement of mechanical stirring and baffle mixing and the installed hollow fiber membrane packing. The upper layer of the reactor is biological packing 4, and the biological packing 4 is opposite to the flowing wastewater. Perform hydraulic cutting to fully mix the suspended sludge with water, which provides favorable conditions for the growth of hydrolytic acidification bacteria.

It is worth noting that the water inlet pipe of the hydrolysis and acidification tank contains a plurality of evenly distributed water outlet holes to form a water distribution pipe network system, which can make the bottom part of the sludge in a suspended state and fully mix with the incoming wastewater to improve the water quality treatment effect. , the suspended sludge can play a strong flocculation effect, so that the impurities in the water quickly settle, and the complex macromolecular organic matter is decomposed into simple small molecular organic matter by the hydrolysis bacteria in the pool.

It is worth noting that the biological filler 4 adopts hollow fiber membranes and elastic fillers arranged at intervals, the outer diameter of a single membrane wire of the fiber membrane is 4.0-4.4 mm, and there are holes on its surface, and the pore size of the holes is 0.1-0.2 mm The membrane filaments are bundled every 50-100 units to form a membrane bundle, the minimum outer diameter of the membrane bundle is 20 mm, the maximum outer diameter is 100 mm, and the specific surface area is 12000 m ² /g.

It is worth noting that the contact oxidation tank is provided with an aeration unit and a packing unit. A jet aerator is placed respectively, and then aeration pipes are evenly arranged in the center of the bottom of the pool body. The distance between the axes of the pipes is 500mm, and the distance between the axes of the aeration discs is 600mm.

It is worth noting that a biofilm is installed in the contact oxidation tank, and the biofilm is an ecosystem composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.

The utility model adopts PLC to control the whole set of equipment, adopts fully automatic operation mode, automatic processing, automatic metering and automatic dosing.

Implementation Effect:

A hospital used a chemical dosing and disinfection method before, by adding sodium hypochlorite to the sewage to eliminate bacteria and other pollutants in the water. The COD in the treated sewage is 180-220mg/L and the BOD is 60-90mg/L, which is difficult to meet the pretreatment standard in Table 2 of "Water Pollutant Discharge Standards for Medical Institutions" GB18466-2005. Moreover, the residual chlorine content in the treated sewage reaches a maximum of 9.8 mg/L, which is about to exceed the discharge warning line. Not only the cost of using chemicals is high, but also it is easy to cause secondary pollution of residual chlorine, which is more harmful to the discharged water.

After the treatment system method of the utility model is used for transformation, after the system runs stably for 1 month, the monitoring results show that the effluent effect is continuously and stably up to the standard, the COD can be stabilized at about 90mg/L, the BOD is 50mg/L, and the SS is less than 30mg/L Meet the relevant medical wastewater discharge requirements. In addition, the amount of disinfectant used is small, and the problem of secondary pollution of residual chlorine will not occur.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a hospital sewage treatment process system, includes grid well, synthesizes equalizing basin, hydrolysis-acidification pool, contact oxidation pond, sedimentation tank, disinfection pond and marshall groove and according to description order fixed connection in proper order, its characterized in that: the hydrolytic acidification pond is still connected with sludge thickening tank, sludge thickening tank's blowdown export sets up folds the spiral shell machine, sludge thickening tank still reflux connection synthesizes the equalizing basin, the sedimentation tank passes through sludge reflux pump reflux connection hydrolytic acidification pond, the grid well specifically is the thin grid of rotation and is supporting to have corresponding grid sediment screw conveyer, hydrolytic acidification pond's bottom is provided with row mud pipeline, the grid well is connected through first elevator pump and is synthesized the equalizing basin, synthesize the equalizing basin and connect hydrolytic acidification pond through the second elevator pump, the disinfection pond sets up the baschel groove.

2. The hospital sewage treatment process system according to claim 1, characterized in that: the hydrolysis acidification tank is a cylindrical tank body, the top of the hydrolysis acidification tank is provided with a cover plate (2), the top of the cover plate (2) is welded with a portal frame (1), a stirrer (8) is fixedly arranged on the portal frame (1), a reaction zone clapboard (6) is arranged inside the hydrolysis acidification tank, a water outlet bell mouth (5) is arranged on the reaction zone clapboard (6), the center of the bell mouth (5) is provided with a supernatant fluid return pipe inlet (11), the supernatant fluid return pipe inlet (11) is communicated with a return pipe outlet (10) through a supernatant fluid return pipe (9), an outlet overflow weir (3) is arranged at the opening of the hydrolysis acidification tank, the bottom of the hydrolysis acidification tank is of a mud bucket (7) structure, and a biological filler (4) is arranged below the effluent overflow weir (3), and the biological filler (4) is arranged at intervals by adopting a hollow fiber membrane and an elastic filler.

3. The hospital sewage treatment process system according to claim 2, characterized in that: the biological filler (4) is arranged by adopting a hollow fiber membrane and an elastic filler at intervals, the outer diameter of a single membrane wire of the fiber membrane is 4.0-4.4 mm, and the surface of the fiber membrane is provided with holes.

4. The hospital sewage treatment process system according to claim 3, characterized in that: the aperture of the hole is 0.1-0.2 micron, and the membrane filaments are bundled into membrane bundles every 50-100 units.

5. The hospital sewage treatment process system according to claim 4, characterized in that: the minimum outer diameter of the membrane bundle is 20 mm, the maximum outer diameter is 100 mm, and the specific surface area is 12000m²/g。

6. The hospital sewage treatment process system according to claim 1, characterized in that: an aeration unit and a filling unit are arranged in the contact oxidation tank.

7. The hospital sewage treatment process system according to claim 6, characterized in that: the aeration unit adopts a mode of combining a jet aerator and a microporous aeration disc for aeration, the angular points on the periphery of the bottom of the tank body are respectively provided with the jet aerator, and then aeration pipelines are uniformly distributed in the center of the bottom of the tank body.

8. The hospital sewage treatment process system according to claim 7, characterized in that: the distance between the axes of the pipelines is 500mm, and the distance between the axes of the aeration discs is 600 mm.

9. The hospital sewage treatment process system according to claim 1, characterized in that: the contact oxidation pond is internally provided with a biological membrane which is an ecological system consisting of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.

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